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用swift重写stanford CS193P的纸牌游戏 （1）- Card 和Deck
本系列编号基本对应stanford CS193P的课程编号，可能有一两节课的误差：比如我标（1）就对应Lecture 1，但有时我做得快了就变成(1)对应lecture 1的全部和lecture 2的一部分。
前言：
我没学过OC，想学swift，可是网上只有教swift基本语法和写命令行程序的初级教程。
所以我只好拿个OC的教程，一边学swift，一边把OC的教程里的代码改成swift的，我想改完了之后应该就等于看了swift的教程了吧。
正文：
本文包括两个类，Card和Deck，以及一个单元测试类。写完之后的感觉：原来的教程教OC语法的部分看得我睡着了，而直接用swift写极简单。
具体值得记录的点有：
1.swift没有自动类型转换，只有类型推断，在arc4random % count 的时候无法自动转换类型。所以我加了个强制类型转换。
2.我debug测试类的时候发现xcode里显示不出我往deck.cards里插入的card，显示为invalid，但实际上是正确的。可能和我用的xcode6还是beta1有关。
3.drawRandomCard 的时候一开始我先做了remove，后做return，结果已经被remove掉的元素无法return。后加了个中间变量先暂存了一下要return的card。
4.感觉原来的OC语法比swift复杂很多。
5.感觉MVC部分CS193P的老头讲得挺好的。
代码：
首先是测试类：
1 // 2 // CardGameTests.swift 3 // CardGameTests 4 // 5 // Created by colin.zt on 14-6-6. 6 // Copyright (c) 2014年 Ting. All rights reserved. 7 // 8 9 import XCTest10 11 class CardGameTests: XCTestCase {12 13 override func setUp() {14 super.setUp()15 // Put setup code here. This method is called before the invocation of each test method in the class.16 }17 18 override func tearDown() {19 // Put teardown code here. This method is called after the invocation of each test method in the class.20 super.tearDown()21 }22 23 func testCard() {24 // This is an example of a functional test case.25 // XCTAssert(true, "Pass")26 var a: Card = Card()27 var b: Card = Card()28 a.contents = "test card a"29 b.contents = "test card b"30 var cards: Card[] = [a,b]31 var result = a.match(cards)32 // println(a.contents)33 XCTAssert(result == 1, "Pass")34 }35 36 func testDeck() {37 38 var deck_a:Deck = Deck()39 40 var card_a:Card = Card()41 var card_b:Card = Card()42 var card_c:Card = Card()43 44 card_a.contents = "card a"45 card_b.contents = "card b"46 card_c.contents = "card c"47 48 deck_a.addCard(card_a)49 pirnt_all_cards_left(deck_a)50 XCTAssert(deck_a.cards[0].contents == "card a", "Pass")51 52 deck_a.addCard(card_b)53 pirnt_all_cards_left(deck_a)54 XCTAssert(deck_a.cards[0].contents == "card a", "Pass")55 XCTAssert(deck_a.cards[1].contents == "card b", "Pass")56 57 deck_a.addCard(card_c,atTop:true)58 pirnt_all_cards_left(deck_a)59 XCTAssert(deck_a.cards[0].contents == "card c", "Pass")60 XCTAssert(deck_a.cards[1].contents == "card a", "Pass")61 XCTAssert(deck_a.cards[2].contents == "card b", "Pass")62 63 var random_card: Card = deck_a.drawRandomCard()64 println("Now draw this random card:")65 println(random_card.contents)66 pirnt_all_cards_left(deck_a)67 XCTAssert(random_card.match(deck_a.cards) == 0, "Pass")68 XCTAssert(deck_a.cards.count == 2)69 70 var random_card_2: Card = deck_a.drawRandomCard()71 println("Now draw this random card_2:")72 println(random_card_2.contents)73 pirnt_all_cards_left(deck_a)74 XCTAssert(random_card_2.match(deck_a.cards) == 0, "Pass")75 XCTAssert(deck_a.cards.count == 1)76 }77 78 func pirnt_all_cards_left(deck:Deck){79 println("_______________________________________")80 println("Now these cards in deck")81 for card in deck.cards{82 println(card.contents)83 }84 println("_______________________________________")85 }86 87 func testPerformanceExample() {88 // This is an example of a performance test case.89 self.measureBlock() {90 // Put the code you want to measure the time of here.91 }92 }93 94 }
然后是Card类
1 // 2 // Card.swift 3 // CardGame 4 // 5 // Created by colin.zt on 14-10-18. 6 // Copyright (c) 2014年 Ting. All rights reserved. 7 // 8 9 import UIKit10 11 class Card: NSObject {12 13 init(){} //empty init method14 var contents: String = "" //give it a default value15 var chosen: Bool = false16 var matched: Bool = false17 18 //check if some card mathes some cards19 func match(cards: Card[])->Int{ 20 var score = 021 for card in cards{22 if card.contents == self.contents23 {24 score = 125 }26 }27 return score28 }29 30 31 }
最后是Deck类
1 // 2 // Deck.swift 3 // CardGame 4 // 5 // Created by colin.zt on 14-10-18. 6 // Copyright (c) 2014年 Ting. All rights reserved. 7 // 8 9 import UIKit10 11 class Deck: NSObject {12 13 init(){} //init14 var cards: Card[] = [] //a deck has an array of cards, empty by default15 16 //add a card into this deck‘s cards array17 func addCard(card: Card){18 self.addCard(card,atTop:false)19 }20 21 //add a card into this decks‘s cards array‘s top, first element22 func addCard(card:Card,atTop:Bool){23 if atTop {24 cards.insert(card, atIndex: 0)25 }26 else{27 cards.append(card)28 }29 }30 31 //draw a card from the deck randomly, it removes the card32 func drawRandomCard()->Card{33 var index = Int(arc4random()) % self.cards.count34 var random_card:Card = cards[index]35 cards.removeAtIndex(index)36 return random_card37 }38 }
用swift重写stanford CS193P的纸牌游戏 （1）- Card 和Deck
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